The following question is one that was provided by designers for
the A basic level exam. It is NOT included in the final
published test and is for reference only. The topic is Hole
Requirements...
*************************************************************
110 Given a maximum through-hole component lead
diameter of 0.5 mm [.020"], what is the minimum
finished plated through hole size that should be used?
A. 0.60 mm [.024"]
B. 0.65 mm [.026"]
C. 0.70 mm [.028"]
D. 0.75 mm [.030"]
select the most correct answer
*********************************************************
Previous QOD
109 What is the most probable cause of a through-hole
multilayer board assembly repeatedly containing
defective joints on the power and ground
connections?
D. component through-holes are not thermally relieved
Resource: IPC-T-50 Specific Terms and IPC-D-275 para
5.3.2.3; figure 5-17
*********************************************************
Please send comments, constructive critique, or suggestions to
Lisa Williams at [log in to unmask]
Dieter Bergman